| Vykuntha Padala (Department: Biochemistry and Molecular Biology) • Instructor of Biochemistry and Molecular Biology |
| Paul Painter (Department: Material Science and Engineering) • Professor of Polymer Science |
| Carlo G. Pantano (Department: Material Science and Engineering) • Distinguished Professor of Materials Science and Engineering • Director, Materials Research Institute • Director, Center of Glass Surfaces, Interfaces, and Coatings |
| Richard Parizek (Department: Geosciences) • Professor of Geosciences and Geoenvironmental Engineering |
| Anouk Patel-Campillo (Department: Agricultural Economics and Rural Sociology) • Assistant Professor of Rural Sociology |
| Ganapati Patil (Department: Statistics) • Distinguished Professor of Mathematical Statistics • Director, Center for Statistical Ecology and Environmental Statistics |
| Mark E. Patzkowsky (Department: Geosciences) • Associate Professor of Geosciences |
| Eva J. Pell (Department: Plant Pathology) • John and Nancy Steimer Professor of Agricultural Sciences • Senior Vice President for Research • Dean of the Graduate School |
| Gary Perdew (Department: Veterinary and Biomedical Sciences) • Distinguished Professor of Veterinary Science • Director of the Center for Molecular Toxicology and Carcinogenesis • John T. and Paige S. Smith Professorship in Agricultural Sciences |
| Joseph Perez (Department: Chemical Engineering) • Adjunct Professor of Chemical Engineering |
| Horacio Perez-Blanco (Department: Mechanical and Nuclear Engineering) • Professor of Mechanical Engineering |
| Jeffrey Peters (Department: Veterinary and Biomedical Sciences) • Professor of Environmental Toxicology |
| Blake Peterson (Department: Chemistry) • Associate Professor of Chemistry |
| Donna Peuquet (Department: Geography) • Professor of Geography |
| Chris Pfeiffer (Department: Penn State Institutes of Energy and the Environment) • PSIEE Network Administrator |
| C. Russell Philbrick (Department: Electrical Engineering) • Professor of Electrical Engineering |
| Sarma Pisupati (Department: Energy and Mineral Engineering) • Associate Professor of Energy and Geo-Environmental Engineering • John T. Ryan Jr. Faculty Fellow, College of Earth and Mineral Sciences • Undergraduate Program Officer of Energy Engineering |
| Ute Poerschke (Department: Architecture) • Associate Professor of Architecture |
| Mary Poss (Department: Biology) • Professor of Biology and Veterinary and Biomedical Sciences • Director, Center for Infectious Disease Dynamics |
| Eric Post (Department: Biology) • Associate Professor of Biology |
| Sandeep Prabhu (Department: Veterinary and Biomedical Sciences) • Assistant Professor of Veterinary and Biomedical Sciences |
| Virendra M. Puri (Department: Agricultural and Biological Engineering) • Distinguished Professor of Agricultural Engineering |